Working with Beams
Author: ProzaicMuze (sc2mapster.com)Tags: intermediate data  
Source: http://forums.sc2mapster.com/resour...Added 13 years ago 

First things first, I expect that if you're reading this, you're clueless when it comes to beams. Why? Because you saw beginner and came to this tutorial. That being said, my job is to help you no longer be clueless and show off your awesome beam weapons and abilities in your future maps :D This will also help to prepare you for my more advanced beam tutorial.

Example map: (link)

The Basics

Beams are nothing more than models. They can't do anything on their own and unlike missiles they aren't a physical unit that travels from point A to B. In order to get a Beam to do anything you must rely on actors and effects. Thus every proper Beam is made up of the following parts:

We will be spending all of our time in these 3 tabs. If you have to go to another tab for any reason other than to make a turret, weapon or unit, you're in the wrong place. This is going to be all about the simple mechanics behind how beams work.


Goals

No introductory learning tool is complete without laying out goals. So we're going to make 3 of them:

Let's get started!


Testing My Map

Before you create the beams it's important that you see what it is they do in game. Look at the terrain before you Test Document (Ctrl + F9). In the middle are the two units that shoot beams and in the NE corner is the tower that shoots lightning. All the other zerg units are stock. Now test the document. It's going to say it's tied (I ignore triggers in example maps) so click "Return to game."

Start by attack-moving all the Lancers (Marines) into the SW corner. Pew pew pew! Lots of dead zerg by colossi beams.

Now attack-move all the Ionic Splitters (Hellions) into the SE corner. Notice that it shoots a green void ray beam (instead of blue) that forks. This is done using Actor Events. If you pay close attention, you'll also notice that the forks will almost always hit the Ultralisks. This is done using Target Sorts

Now take both groups and attack-move into the NW corner. Again, notice that Ionic Splits will hit their target and then fork to the Ultralisks until they are almost dead.

Lastly, take everything and attack-move into the NE corner. Uh oh, massive lightning tower! If you've played any TD maps prior to this, you might notice that the lightning beams aren't coming from the very top. Instead they're coming from the rod slightly below that. It looks more realistic. This is done using Site Operations. Also, the beams are brighter/thicker than they normally would be (you might not notice this if you haven't seen them as they normally are). That's more Actor Events.

Everything you see was done with Models, Actors and Events.


The Lancer

Make sure your Data Editor (F7) is open and ready to go. You can either open the Previewer (Ctrl + Shift + V) to select the beams you want or you can use the sames ones I did. If you choose your own beams it will be up to you to swap them in where I place my beams and match their animations when we go into Actor Events. I will give reminders along the way to help those who want to do this.

Effects Tab

Open with Data Type menu if needed

We've only got one effect to make: damage. Click on the effects tab. The effects will show up on the upper left box, it's links (objects that are tied to it) will show up in the bottom left box and the entire right hand area is the data editing field. Make sure all 5 buttons (ignore the 6th on the other side of the divider) left of the search bar are pressed. This will allow you to follow my "short hand."

AI Notify Flags, Flags and Response Flags are VERY important to apply to every damage effect you make. If you don't, the AI won't know what to do when attacked by them which will prevent units you attack from returning fire if your units aren't within their proximity auto-acquire range. In my more advanced tutorials I won't include these as I expect experienced mappers to know this and apply it on their own as needed. Additionally it can help to NOT have units return fire if you need them to hold still long enough to see what happens visually. Keep this in mind when testing abilities. The rest of this tutorial will have these included to help you get acquainted with these fields, however.

Models Tab

Open with Data Type menu if needed

Actors Tab

Open with Data Type menu if needed

If you are using a different model, make sure you set Animation Properties to whichever animation actually shows up such as Birth or Stand. Some models don't have more than one animation. For example most impact models just have a Death animation.

Now your beam will show up every attack and make the proper sounds.

Units Tab

Open with Data Type menu if needed

Duplicate Marine and check the following boxes:

Marine

Start by renaming the Marine model Lancer. Go on to rename the actors Lancer and Lancer_Death and the weapon Plasma Lance ("Lancer -" in the Editor Prefix field). Now delete any abilities, command card buttons or behaviors you don't want and decide on your structure stats (HP, armor etc). Finish by renaming the unit Lancer.

Go to the weapon

Now you have a beam weapon :D


The Ionic Splitter

Effects Tab

This will cause the damage to originate from the search allowing your beams to connect from this impact as opposed to your unit. This is VERY important if you want your beams to chain in any capacity.

This should allow you to shoot a target and have two more beams shoot from that target to units close to it. If you find that not all of your effects are landing, there is a chance that Effect - Maximum Count<> on the Effect - Set<> is set to 1 instead of -1. This field sets the maximum number of effects the set can create at once. Thus -1 is infinity and 1 is only a single effect.

If you want more beams, set a higher Maximum Count<> on the Effect - Search Area.<> The Target Sort will also cause the forking beams to hit beefier targets first. You could even add bonus damage against armored/massive targets if you want the bounces to be extra effective against larger targets.

Models Tab

Actors Tab

This will make your void beams a similar shade of green as their forking beams.

Notice that I didn't put an impact sound. This is because we're going to attack it to the forking beams instead. This is because you don't want the impact sound to play if the forking beams aren't actually hitting anything. If you want a separate noise for the void beam itself, you can, however, add that. I left it out to avoid sound clutter.

Units Tab

Duplicate Hellion and check the following boxes:

Hellion

Start by renaming the Hellion model Ionic Splitter. Go on to rename the actor Ionic Spliter, the turret Ionic Splitter and the weapon Ion Cannon ("Ionic Splitter -" in the Editor Prefix field). Now delete any abilities, command card buttons or behaviors you don't want and decide on your structure stats (HP, armor etc). Finish by renaming the unit Ionic Splitter.

Go to the weapon

Actors Tab

Because we have a turret, we need to enable it before it will be able to fire properly.

Now you have a forking beam weapon :D


The Lightning Tower

Effects Tab

It might not make complete sense working backwards, but this is how the series works:


Weapon Fires > Set 1 [Search 1 + Damage 1] > Search 1 Impact: Set 2 [Search 2 + Damage 2 (Launches from Search 1)] > Search Impact 2: Damage 3 (Launches from Search 2)

Following this pattern you can make the chain as long as you want :)

Models Tab

Actors Tab

This actor is what is going to allow us to adjust where the beam chain shoots from on our structure.

Units Tab

Duplicate Sensor Tower and check the following boxes:

Sensor Tower

Start by renaming the Sensor Tower model Lightning Tower. Go on to rename the actor Lightning Tower. This structure doesn't have a weapon so you'll have to add one. Hop over to the Weapons Tab and make a new weapon named Energy Coil using the default settings. Add "Lightning Tower -" in the Editor - Editor Prefix field. Now return to the unit to delete any abilities, command card buttons or behaviors you don't want and decide on your structure stats (HP, armor etc). Finish by renaming the unit Lightning Tower and adding a new weapon to Combat - Weapons + using the Ionic Splitter turret and your newly created weapon.

Go to the weapon

Now you have a beam chain weapon.

Feel free to use the attached Test Map or contact me via forum post, PM or IRC (#SC2Mapster on chat.freenode.net:6667) if you encounter problems. Keep in mind that I'm a busy person so I may not reply right away, but I'll do my best to answer all questions/concerns that I am aware of :)








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